Income Taxes Net deferred tax asset (liability) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Tax Assets [Abstract]
Non-deductible reserves and other	$ 445,128	$ 475,730
Inventory valuation reserves	599,763	770,566
Net operating loss (NOL) carryforwards:
Federal	515,568	726,398
State	257,738	292,195
Alternative minimum tax credits	34,812	28,683
Energy credit and charitable contribution carryforward	27,858	39,978
Deferred Tax Assets, Gross	1,880,867us-gaap_DeferredTaxAssetsGross	2,333,550us-gaap_DeferredTaxAssetsGross
Deferred Tax Liabilities [Abstract]
Capitalized items, including real estate basis differences, deducted for tax, net	(31,584)	(39,449)
Trademarks and tradenames	(46,362)	(50,047)
Deferred Tax Liabilities, Gross	(77,946)us-gaap_DeferredIncomeTaxLiabilities	(89,496)us-gaap_DeferredIncomeTaxLiabilities
Valuation allowance	(82,253)	(157,300)
Net deferred tax asset (liability)	$ 1,720,668us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 2,086,754us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount of deferred tax liability attributable to taxable temporary differences.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from reserves and accruals.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated impairment losses.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from other capitalized costs not separately disclosed.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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